Download CCDS Exam Review Questions With 100% Correct Answers (2023 – 2024) and more Exams Public Health in PDF only on Docsity! CCDS Exam Review Questions With 100% Correct Answers (2023 – 2024) What lead insulation materials are known for reducing fibroblast ingrowth and susceptibility to Metal-ion induced oxidation (MIO) and Environmental Stress-Cracking (ESC) - ePTFE and 80A polyurethane What is the most common cause of safety pacing or "ventricular safety standby?" - Ventricular Ectopy Ventricular safety standby is a feature designed to avoid the inappropriate inhibition of V-pacing due to crosstalk oversensing of an Ap event on the ventricular EGM. Not sure why the book says that PVCs are the most common cause, perhaps because bipolar leads have made Crosstalk such a rare- occurring issue now. Which electrode material is most likely to result in higher pacing thresholds and higher degree of polarization? - Elgiloy What phase of the action potential correlates to relative refractory period? - 3 The ventrical trial conduction time of a pacemaker patient with a typical endless-loop-tachycardia may be calculated by which equation? - (upper rate limit interval) - ( AV delay + PVARP) ? or is it just MTR (URL) - AVD For treatment of arrhythmias, most drugs work by altering _______ or __________. - Conductivity or Refractoriness 1Hz = ??bpm - 60bpm What would cause a more significant drain on battery charge... ATP before charge or ATP during charge? - ATP DURING charge Increased current density is expected with what type of lead feature? - Small tip (cathode) surface area ________ is the component of a device that converts both positive and negative components into a signal with only one component. - Rectifier Which of the following would account for the most common cause of inappropriate Mode switching? A: Ventricular lead sensing atrial signals B: Lead Insulation break C: Oversensing EMI D: Atrial lead sensing Ventricular Signals - D: Atrial lead sensing Ventricular Signals ________ ________ is a closed loop sensor used by Biotronik for sensor-driven pacing rate. - Myocardial Contractility Measures intracardiac impedance and said to reflect autonomic nervous stimulation. Impedance measure from Cathode to PG every 31.25ms after RVp event. What are some of the effects of Hyperkalemia? - Increased stimulation threshold (notable increase if K>=7) Wide QRS Latency undersensing Peaked T-waves What is the "made easy" formula for calculating Estimated Battery Service Life? - 114 x (Ampere hour capacity / Current drain in MicroAmps) Formula for determining Wenckebach window: - MTR - TARP Fluoroquinolones, a new generation of broad-spectrum oral ABX, is known for what cardiac effect? - Prolonging QT interval Fluoroquinolone names usually end with -________. - -floxacin (Ciprofloxacin, Difloxacin, Norfloxacin) What component protects a pacemaker's circuitry from high external voltages, such as an external defibrillation? - Zener Diode Energy is measure in ____________. - Watt-second _______ is a test used as a tool for assessing autonomic modulation of the sinus node. This parameter decreases in heart failure patients as a result of down regulation of beta receptors. - Heart Rate Variability Normal Ejection Fraction - 50-65% Which pacemaker component is most susceptible to cumulative damage from high dose radiation? - CMOS The _______ study looked at rate control vs rhythm control, and concluded based on total mortality that rate control with anticoagulation was at least as effective. - AFFIRM _____% of congenital open heart surgeries develop AV-Block. - 1-3% ___________ use the same MICS band and may possibly cause long range interference with CRM device remote monitoring. - Weather Balloons In a normal person, stroke volume increases by ___% during exercise. - 50% ___________ is the process by which the ICD battery is used to transfer electrical energy to magnetic energy through a charging circuitry transformer. This magnetic energy is used to "push" the voltage into the capacitors, which is then discharged into the patient. - Inductance Formula for computing total resistance of a parallel circuit? - (R1 x R2) / (R1 + R2) Battery capacity is given in what parameter? - Current (AMP hours) Percent tilt of an ICD refers to what? - Decline in leading edge voltage at the time of truncation What is the mm equivalent of one French size? - 0.3mm What drug is known to increase DFT within 2 days? - Flecainide Are men or women more at risk for SCD 2/2 long QT syndrome? - Women
